Hey guys! I'm new to this site so take it easy on me! Just purchased a 1985 200x and I'm having some issues. It has a 250 top end and a 200x bottom end. Appears to have a 200x carb on it, although I'm not sure if they differ from the 200 to the 250. Anyways, it will start right up, but I've noticed when the choke is on it won't run and when the choke is off it will idle but hitting the gas bogs it ans has barely and power. It runs the best on half choke with great throttle response but it's totally gutless. it has loads of compression..
I noticed the gas tank was pretty rusty inside after draining it and the gas was a dark grey. Yuck! Also I see there is no boot from the carb to the air cleaner. To me this sounds like a lean condition. What could be causing this? The dirty fuel? A dirty carb? The carb boot ? Wrong size carb? Off jetting? Please any advice would be highly appreciated. Would really like to get this thing running like a raped ape!